| Acronym | Meaning |
 | CLC | Change Letter Control |
| STE | System Test Engineer |
| SAT | Saturate |
| DIAGN | Diagnose |
| OPR | Operations Planning Review |
| OSTA | Office Of Space And Terrestrial Application(s) |
| FERD | Facility And Equipment Requirements Document |
| PSS | Propulsion Support System |
| EC | Element Contractor |
| EEIS | End-to-End Information System |
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